Rigid conduit ground connecter



July 28, 1931. E. J. NOBLE RIGID CONDUIT GROUND CONNECTER Filed March 9 1929 Patented July 28, 1931 UNITED STATES PATENT mm EDWARD J. NOBLE, OF NEW LONDON, CONNECTICUT, ASSIGNQR TO GILLETllE-VIBZBER COMPANY, INCORPORATED, OF NEVT LONDON, CON NECIIIGUCIQ A -CO RPOB-AE1 ION OF CONNECTICUT RIGID GONDUIT GROUND Application filed Mar-ch 9, 1929. Serial 110,645,665.

My invention relates to the improvement in a rigid conduit ground connector and the novelty consists in the adaptation and arrangement of parts as will be more fully hereinafter pointed out.

Although flexible conduits are now extensively used in many electrical wire installations, there are still many types of construction in which the rigid pipe conduit 1s still used for carrying electrical wiring because of appearance or special requirements which specify this type of conduit.

The ground connecters now in general use in connection with rigid pipe conduits require soldering or some complicated method of securing the ground connecter to the conduit.

My device has overcome the necessity of such prolonged hand labor, furnishing a unit which is adapted to be threaded on to the standard conduit pipe which is threaded at its terminal to receive the same, whereby the expense of installation is substantially cut down and a more perfect connection is made which can be readily disconnected at any time, although the connection is secure and permanent against accidental breaking of the connection.

Referring to the drawings, Figure 1 is a top plan view of my device connected to a rigid conduit and ground pipe, both of which are broken away for convenience in illustration.

Figure 2 is a vertical section on the line 2 2 of Figure 1.

Figure 3 is a side elevation of Figure 1.

In the drawings 4 is a rigid conduit having a threaded portion 5 at its terminal end and in which is mounted a wire 6 having the usual insulation 7. My ground connecter has a rigid coupling portion 8 which is internally threaded at 9 and a rigid extension portion 10 to which is secured by means of rivets 11 a flexible clamping member 12 which has a large wire pocket 13 tapering into a smaller wire pocket 14 and having an opening or outlet l5 and a series of holes 16 adapted to be engaged by the'usual bolts 17 and nuts 18 whereby the flexible clamping member 12 may be clamped around on ground pipe 19 in the usual well known manner, the particular holes 16 being used which will accomplish this on the particular size ground pipe 19 whichmay be used. 4

In mounting my device, the terminal end of the rigid conduit 4 willbe-threaded at 5 in the usual well'known manner and the inter nally threaded rigid coupling portion Swill threadon to said threading 5 therebysecuring. my ground connecter rigidly on the rigid conduit 4. The wire 6, carrying insulation 7 will be brought down throughtherigid conduit 4 in the usual well known manner and because of the large wire pocket' l3can be brought through my ground "connecter readily, and the insulation 7 cangthen be removed from the end of the wire 6 whereupon the stripped wire can be placedin the smaller of the conduit circuit directly on thevgrounld pipe through a 'flexiblefclamping member adapted to fit anycon'duit groundpipe which it may be necessary to use, whereby a perfect grounding of the electrical circuit carried in the rigid-conduit is effected through a connecter which entirely encases the grounding portion of the circuitthereby protecting it completely'against dirt and moisture or breakage, whereby a perfect grounding of an electrical circuit carried in a rigid conduit is readily established and positively maintained under any and all conditions.

It will be apparent that many variations may be made in my particular structure without departing from the spirit and intent of the invention.

I claim 1. A ground connecter comprising the combination of a rigid threaded coupling having an extension member, a ground pipe flexible clamp rigidly secured to said extension member and consisting of a portion having a large wire pocket tapering into a smaller pocket and a further extended end portion, bent back and covering the large pocket portion, and fastening means for securing the end in position. 7

2. A ground connecter comprising the combination of a rigid coupling means fora rigid conduit, a means fixedly secured thereto at one end and having a large ground Wire pocket tapering into a groove pocket and outlet and the opposite end of said flexible clamp turned back and covering the large pocket portion, and means for detachably securing said opposite end in position.

3. A ground connecter comprlsing the combination of a rigid coupling means for a rigid conduit, a flexible ground pipe clampingmeans rigidlysecured thereto at one end andhaving a large ground wire pocket tapering into a groove pocket having an outlet and adapted to be folded back and detachably secured at its'outer end to cover said large pocket whereby a ground wire carried therein is entirely encased between said rigid conduit and around said ground.

4. A' ground connecter comprising the combination of an internally threaded rigid conduit connecter having an extension member, 'a flexible ground pipe clamp rigidly secured to said extension and having a large ground wire pocket tapering into a smaller pocket and an outlet, saidclamp bent back and covering said large pocket, and separable fastening means for securing the end in position whereby said ground Wire is maintained entirely encased from said rigid conduit to and around said ground.

5. A ground connecter comprising the combination of a rigid internally threaded coupling having an extension semi-cylindrical lip member, a flexible ground pipe clamp rigidly secured at one end to said lip ,member, a large semi-cylindrical wire pocket slmllar to and running from sald extension lip into a small wire pocket terminating in a wire outlet, said clamp running around said ground and being turned back over said large pocket to entirely encase a ground wire and means for detachably'securing the other end of said clamp to said lip.

In testimony whereof I afiix my signature.

EDWARD J. NOBLE. 

